ADS112U04IRTER from Texas Instruments, in a WQFN-16-EP(3x3). Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	RESET	input	Active-low reset input. Referenced to DVDD/DGND; valid input range DGND to DVDD.
2	DGND	power_in	Digital ground return for DVDD and all digital I/O.
3	AVSS	power_in	Negative analog power supply. Unipolar: tie to DGND. Bipolar: -2.75 V to -2.3 V vs DGND. Connect thermal pad here.
4	AIN3	input	Analog input channel 3 to the input mux/PGA. Absolute range AVSS-0.1 V to AVDD+0.1 V (PGA disabled).
5	AIN2	input	Analog input channel 2 to the input mux/PGA. Absolute range AVSS-0.1 V to AVDD+0.1 V (PGA disabled).
6	REFN	input	Negative external voltage reference input. Absolute range AVSS-0.1 V to V(REFP)-0.75 V.
7	REFP	input	Positive external voltage reference input. Absolute range V(REFN)+0.75 V to AVDD+0.1 V; differential VREF 0.75 V to AVDD-AVSS.
8	AIN1	input	Analog input channel 1 to the input mux/PGA. Absolute range AVSS-0.1 V to AVDD+0.1 V (PGA disabled).
9	AIN0	input	Analog input channel 0 to the input mux/PGA. Absolute range AVSS-0.1 V to AVDD+0.1 V (PGA disabled).
10	AVDD	power_in	Positive analog power supply, 2.3 V to 5.5 V referenced to AVSS. Decouple with a 100-nF (or larger) capacitor to AVSS.
11	DVDD	power_in	Positive digital power supply, 2.3 V to 5.5 V referenced to DGND. Decouple with a 100-nF (or larger) capacitor to DGND.
12	GPIO2/DRDY	bidirectional	General-purpose digital I/O 2, or active-low data-ready output (DRDY) when configured. Signal levels DGND to DVDD.
13	TX	output	UART serial data output (8-N-1, up to 120 kBaud). Driven between DGND and DVDD.
14	RX	input	UART serial data input (8-N-1, up to 120 kBaud, with auto-baud detection). Valid input range DGND to DVDD.
15	GPIO1	bidirectional	General-purpose digital input/output 1. Signal levels DGND to DVDD.
16	GPIO0	bidirectional	General-purpose digital input/output 0. Signal levels DGND to DVDD.
PAD	PAD	power_in	Exposed thermal pad on the bottom of the WQFN package. Must be connected to AVSS for proper thermal and electrical operation.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	WQFN-16-EP(3x3)
Category	Data Acquisition
Pins	17

Ordering variants

Same part, different packaging or reel option.

ADS112U04IRTER
ADS112U04IRTET
ADS112U04IRTER.B
ADS112U04IRTET.B
ADS112U04IRTERIPW
ADS112U04IRTERIPWR
ADS112U04IRTERIPW.B
ADS112U04IRTERIPWR.B

CAD (KiCad official)

Symbol: ADS112U04IRTER
Footprint: Package_DFN_QFN:QFN-16-1EP_3x3mm_P0.5mm_EP1.7x1.7mm
3D model: WQFN-16-EP(3x3) (KiCad packages3D, STEP)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: Texas Instruments datasheet (None pp, sha256 6f8d0ff90a8f4ca9, retrieved 2026-08-17, tier: lcsc)
Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF